Sofa



FIG. 1 is a front perspective view showing the new design;

FIG. 2 is a rear perspective view thereof;

FIG. 3 is a front and left side perspective view thereof;

FIG. 4 is a rear and right side perspective view thereof;

FIG. 5 is a left side perspective view thereof; the right side perspective view is a mirror image of this view and has therefore been omitted;

FIG. 6 is a top perspective view thereof; and,

FIG. 7 is a bottom perspective view thereof. 

CLAIM The ornamental design for a sofa, as shown and described. 